Safety device for printing-presses.



W. H. SYLVESTER.

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jdo/"72g ITE STATE@ @FFICE WILLIAM I-l'. SYLVESTER, OF PHILADELIIA, PENNSYLVANIA, ASSIGNOR TO WILLIAM I-I. SYLVESTER 85 SONS, OF PHILADELPHIA, PENNSYLVANIA, A FIRIVI.

SAFETY DEVICE FOR PRINTING-PRESSES.

Application filed September 4, 1915.

To all whom it may Concern.'

Be it known that I, IVILLIAM I-I. Srnvnsfren, a citizen of the United States, and resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Safety Devices for Printing-Presses, of which the following is a specification.

My invention relates to improvements in safety guards for printing presses, and the object of my invention is to furnish a simple, inexpensive, and eilicient guard for preventing iniury to the hands of a pressman who is operating an oscillating press.

My invention is illustrated in the accompanying drawings which form part of this specification, in which similar letters of reference indicate similar parts throughout the several views, and in which:

Figure l, is a perspective view of part of an oscillating printing press showing the platen, the chase bed, the connecting rod which reciprocates the platen and my improved safety device, the press being open and my safety device collapsed, and Fig. 2, a perspective view of the parts shown in Fig. l, the press being closed and my safety device raised.

3 is the platen, il the chase bed and 5 the connecting rod which operates the platen. All these parts are so well known that detailed description of them will be unnecessary here.

6 is a bar, secured to the frame which carries the platen, which has pivoted to it at 7-8 one of the ends of the links 9-10 the other ends of which are pivoted to the link ll at i12-13, respectively, forming a parallel movement.

la is a roller at the lower end of link 11. Both sides of the platen are furnished with the bar and links and l5 is a rod extending from one side of the platen to the other and carried by the upper, or outer, ends of links l1.

16 is a curtain one end of which is carried by rod l5 and the other end of which is secured to the platen or platen frame as best shown in Fig. 2.

lVhen the connecting rods 5, one upon each side of the press, are actuated to close the platen in toward the chase, not shown, carried by chase frame 4, these rods and the rollers let carried by lower ends of links l1 Speciieation of Letters Patent.

Patented Nov. 2, MM5.

Serial No. 48,950.

contact, and as the platen closes inward and downward toward the chase the rollers let and rods 5 cause the links il to rise and the rod l5 will lift the arno and hand of the operator clear of the platen and chase should they be in position to be crushed between these parts. As soon as the links il commence to rise the curtain i6 is lifted and prevents the operator from placing his hand in under rod l5 where it might be engaged by the platen and chase.

I am aware thatl there are several devices for accomplishing my end in use with oscillating printing presses, hence I do not claim such a safety device broadly, but

INhat I do claim is l. The combination with the platen and the platen actuating connecting rods of a printing press, of sets of links, one upon each side of the platen, consisting each of two links one of the ends of which are pivotally secured to the platen or its frame and the other ends of which are pivotally connected to a link to form a parallel movement, the lower ends of said latter links being adapted to be engaged by said connecting rods, said latter links and a rod connecting the upper ends of said latter links.

2. 'Ihe combination with the platen and the platen actuating connecting rods of a printing press, of bars secured one upon each side of the platen or its carrying frame, two links pivotally secured to each of said bars, links to which thel other ends of said links are secured, rollers upon the lower ends of said latter links adapted to engage said connecting rods, and a rod connecting the upper ends of said latter links.

3. The combination with the platen and the platen actuating connecting rods of a printing press, of bars secured one upon each side of the platen or its carrying frame, two links pivotally secured to each of said bars, links to which the other ends of said links are secured, rollers upon the lower ends of said latter links adapted to engage said connecting rods, a rod connecting the upper ends of said latter links, and a curtain one end of which is secured to said rod and the other to the platen.

vWILLIAM II. SYLVESTER. IVitnesses:

CHARLES A. BUTTER, J. CRAIG SHIELDS.

Copies of this patent may 'be ehtained for ve cents each, 'by addressing the Commissioner of Patents, Washington, D. C. 

